<template>
  <div class="app-container">
    <!-- 输入表单 -->
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name" />
      </el-form-item>
      <el-form-item label="入驻时间">
        <el-date-picker v-model="teacher.joinDate" value-format="yyyy-MM-dd" />
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" :min="0" />
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
            -->
          <el-option :value="1" label="高级讲师" />
          <el-option :value="2" label="首席讲师" />
        </el-select>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" />
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career" :rows="10" type="textarea" />
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <el-upload
          :show-file-list="false"
          :on-success="handleAvatarSuccess"
          :before-upload="beforeAvatarUpload"
          :on-error="handleAvatarError"
          :action="BASE_API + '/admin/vod/file/upload?module=avatar'"
          class="avatar-uploader"
        >
          <img v-if="teacher.avatar" :src="teacher.avatar" />
          <i v-else class="el-icon-plus avatar-uploader-icon" />
        </el-upload>
      </el-form-item>

      <el-form-item>
        <el-button type="primary" @click="saveOrUpdate()">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<<script>
import teacherApi from "@/api/vod/teacher";
export default {
  data() {
    return {
      teacher:{
        sort: 0,
        level: 1
      },
      BASE_API: 'http://localhost:8333',
    };
  },
  created() {
    //获取隐藏路径
    if (this.$route.params.id) {
      const id = this.$route.params.id
      this.fetchDataById(id)
    }
  },
  methods: {
    // 上传成功回调
handleAvatarSuccess:function(res, file) {
  if (res.code==20000) {
    this.teacher.avatar = res.data
    // 强制重新渲染
    this.$forceUpdate()
  } else {
    this.$message.error('上传失败 （非0）')
  }
},

// 错误处理
handleAvatarError:function() {
  console.log('error')
  this.$message.error('上传失败（http失败）')
},

// 上传校验
beforeAvatarUpload:function(file) {
  const isJPG = file.type === 'image/jpeg'
  const isLt2M = file.size / 1024 / 1024 < 2

  if (!isJPG) {
    this.$message.error('上传头像图片只能是 JPG 格式!')
  }
  if (!isLt2M) {
    this.$message.error('上传头像图片大小不能超过 2MB!')
  }
  return isJPG && isLt2M
},
    fetchDataById:async function (id) {
      let res = await teacherApi.getTeacherById(id)
      this.teacher=res.data
    },
    saveOrUpdate:async function () {
     if (!this.teacher.id) {//如果teacher里没有id，说明是添加
      this.save()
     }else{
      this.update()
     }
    },
    //添加teacher
    save:async function (params) {
       await teacherApi.saveTeacher(this.teacher)
      this.$message({
        type: "success",
        message: "添加成功!",
      })
      //跳转到列表页面
      this.$router.push({path:'/vod/teacher/list'})
    },
    //修改teacher
    update:async function (params) {
       await teacherApi.updateTeacher(this.teacher)
      this.$message({
        type: "success",
        message: "添加成功!",
      })
      //跳转到列表页面
      this.$router.push({path:'/vod/teacher/list'})
    },
  },
}
</script>